I too am getting this messages. It's nice to know it is nothing to worry about. Another one I am getting is port scans being reported from IP's belonging to my ISP's DNS servers. Any suggestions on what to do to clean these up? It would be nice to reduce the number of irrelevant notifications I am getting. Thanks, Chad -----Original Message----- From: Jim Harrison [mailto:jim@xxxxxxxxxxxx] Sent: Wednesday, October 29, 2003 8:20 AM To: [ISAserver.org Discussion List] Subject: [isalist] Re: Well known scan-attack http://www.ISAserver.org This is a common script kiddie tool. It's designed to send your machine into a death-spiral of self-referencing responses, since the source and destination IPs will always alternate between the local machine (127.0.0.1 and your external IP). ISA blocks it as spoofed, since it was received on a network interface. 127.0.0.1 is invalid except in the memory-mapped network inside the machine. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! On Wed, 29 Oct 2003 13:52:27 +0300 "Andrey Silkin" <silkin@xxxxxx> wrote: http://www.ISAserver.org Hi all ! I Some days ago I have received strange notification : ISA Server detected a well-known port scan attack from Internet Protocol (IP) address 127.0.0.1. A well-known port is any port in the range of 1-2048. I don't understand how can it be ? 127.0.0.1 - is the local private address ! It is impossible that somebody scaned my my server from himself . Did somebody have the same notification ? Best Regards Andrey Silkin ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^* All mail from this domain is virus-scanned with RAV. www.ravantivirus.com ^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^* ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: croush@xxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')